/Engine/Source/Runtime/Engine/Classes/Engine/Polys.h
NOTE : This will work for convex or concave sets of polygons but not for concave polygons with holes.
template<typename ArrayType> static void GetOutsideWindings ( [ABrush](API\Runtime\Engine\Engine\ABrush) * InOwnerBrush, ArrayType & InPolygons, [TArray](API\Runtime\Core\Containers\TArray)< [TArray](API\Runtime\Core\Containers\TArray)< FVector3f > > & InWindings )